COMPARISON OF ELECTROCHEMICAL ACCELERATED CORROSION AND CORROSION IN NATURAL ENVIRONMENT

摘要：

Different corrosion products are formed on the steel bars when RC structures aresubjected to different environmental conditions,and different kinds of rust products havedifferent volume expansion. The bigger the expansion coefficient,the smaller the quantity ofcorrosion-products to crack the concrete cover. Therefore,the quantities of corrosion productsto crack the concrete covers subjected to various environments are different. Although theimpressed current technique to accelerate corrosion is used by many researchers inlaboratories,the results are not accurate because the corrosion products formed during theaccelerated test are different from the ones formed in natural environments. In this paper,thesuitability of the impressed current technique of accelerating the corrosion crack to simulatecorrosion in the natural environments is discussed,and a new method to correct the covercracking results of acceleration test is proposed according to the volume expansion cofficientsof corrosion products. The impressed current technique is confirmed to be an effective andquick method of accelerating corrosion,and can simulate corrosion crack under differentenvironment conditions with correction proposed in this study.

关键词： steel reinforced concrete impressed current acceleration corrosion products expansion coefficient

作者: H. Song D.T. Niu S.H. Li

作者单位: Key Laboratory of Seismic and Structural Engineering of the Ministry of Education,Xian University o School of Architectural Engineering,Qingdao Agricultural University,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 1130-1135

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）